Christine Mickelson
USA, Sioux Falls South Dakota

16 July, 2007

Dear Mark,

Thank you for creating this site. My significant other and I have been searching high and low for a begining to PIC programming and your site is just what we need.

Highest Regards.

Chris

anthony
Glasgow

3 July, 2007

Greetings from Scotland!

I really like your web site; most informative and ref. your home life, most reassuring. You are a great encouragement.

Best wishes to you and yours.

A

zool
browsing through google

18 June, 2007

I am trying to learn the PIC the easy way, but none available in the internet, not until I found your website. It is clear and very concise.

It's written with down to earth language, and very easy to understand. I am embarking on a cnc router project, and I need to know the way to program a PIC.

You deserve a credit on this, and thank you very much for a splendid tutorials.

I bookmarked your website, and looking forward for any updates.

Thank You.

xbot sanchez
PH

13 June, 2007

thanks for the info mark. am also planning to build similar shop as yours so i can go ahead workin on some stuff.

am also into arts, music and electronix... they all seem to fit together don ya tink?

jay douglas
arizona, usa

28 May, 2007

thanks for your efforts. its a great site. the legend that is rogers, lives on.

Jimmy Tuffrey
Bristol

19 May, 2007

Oh 'Studio 1's' so that's the name of the speakers I learnt sound on. We had these when I worked at Wild Tracks in the late '80s. Always wondered what they were called. Should have taken more notice at the time. Will never forget the sound of them though. We had four pairs and even now I hear that sound in my head when using my inner ear. An old fashioned sound but very pleasing. Remember them like yesterday. Nice one for your Site.

Richard Harris
UK

11 May, 2007

Nice conversion - Sadly my good lady seems to think we should keep the cars in our double 24 foot wide garage :-(

If you not aware of them have a look at http://www.picaxe.com as an alternative to Parallax. UK company and cheaper.

I came by your site as a result of your battery monitor being Blogged on Makezine.com. We are building an electric car (Greenpower racing) at school and have got to the instrumentation stage, better condition was one of the must have features.

Pat
London

8 May, 2007

Just found your site when looking for links to Orchid White paint. I'm into hi-fi too, and have some MF stuff, a Pink Triangle turntable and a 1970s bathroom suite also in pink!

Will come back for a proper look tomorrow...

Jeremy Travis Teletape
London

5 May, 2007

Thank you for your great site. I worked in the Hi-Fi trade for twenty five years. My company produced the legendary JR149 loudspeakers.

I retrained in production engineering but ended up working in a school. Having now lost my job I have returned to my roots and want to build my own system again. I used to know John Linsley Hood and of course Jim Rogers.

I will enjoy looking at your site. I hope I will find some good designs I can make myself and get back to real music.

MP3 sucks - Hi Fi forever

Thank you

Ray Evans
Bolsover

24 April, 2007

Thank you for your site..just starting with assembler and pics. Thank goodness for a clear and easy to understand
tutorial.

FADY
Israel

19 April, 2007

thank you a lot for these important information about pic

Howard Bailey
Bournemouth in Dorset County UK

16 April, 2007

Dear Mark,
I 'stumbled' across your site whilst browsing, it's definately bookmarked now.
I like your method of teaching, it's very good, especially for complete newbies like me !! Please, please, please more of the same. There is a saying in a UK TV advert i.e. "Those who can, TEACH". I teach First Aid & advanced First Aid, so I understand a lot of the prerequisites that make for good teaching and the satisfaction that you get from it.
Working on my own I am finding it hard and slow going, where would you suggest would be the best places to study/meet others/courses, to accelerate my learning process ?

Christian Furész
EU, Hungary

26 March, 2007

Great site!
I'm not so good at English, but I can understand what you wrote. My favourite project from yours is the 'A4 power amp'. Where can I buy a button like that?
Congratulations from your A4.
Fureszk.

ganesh kumar
india

18 March, 2007

hi Mark,
Thanks for your kind effort to prepare and share such a wonderful work. Yours is one of the best tutorial I have ever come across. Keep going and Growing.

Thanks & Regards,
Ganesh Kumar.

uzun
Türkiye

2 March, 2007

Great info for me.Has helped me understand PIC programming. Thanks for share.

Antonio
Mexico

22 February, 2007

Saludos from Mexico!

Very clear instructions on Pic programing.
I'm taking a colege course on microcontrollers, but my teacher was always a big A*s >_<
Your site helped me understand the basics, now I'm on my own and I'm doing fine! Thanks alot!

Oliver Roditi
Glasgow, Scotland

22 February, 2007

Hi,
Would like to congratulate you on the amazing site. I'm currently sitting with an A100 in front of me and am utterly astounded, such an informative site with a great design. Haven't found much like this for a long time.

Caros Chean
Brazil

18 February, 2007

Wow, I was impressed with your work! As a Musical Fidelity enthusiast, I own 2 A-1, a "British Fidelity" labeled american model and a mkIII version. I also own a P140 power amp and a Digilog DAC. I hope to get a Collector's Edition someday. Please keep with the good job!

Frank
Germany, Baden-Württemberg

27 January, 2007

I am really impressed about your exact work and dokumentation. Go ahead with it.

B. Fisher
Welland, Ontario, Canada

18 January, 2007

Google searched on "Rogers Studio 2 speakers" and came across this great site-kudos to Mark! Am asking anybody out there if they have any info/critiques on these Rogers. Thanx again Mark.

Kyle
Chicago, Illinois - USA

16 January, 2007

Just wanted to say thank you! Your PIC tutorial was very straight forward and easy to learn from.

Andrew
Tokyo, Japan

14 January, 2007

Great site Mark - I hope you are working in a development environment somewhere turning out great products! Nice clean design (I'm talking about your pre-amp here) and beautifully executed.

Best wishes

Jared
Brisbane

3 January, 2007

Hi Mark,

Great website - Great Info.

Has helped me understand asm programming - Finally!

Congratulations on the baby.

Cheers
Jared

Navajyoti Saikia
Namrup-Assam-India

26 December, 2006

just stumbled into your site via google. great job for learners. looking forward for the future enhancements. please don't remove anything from this site. they will help many around the world. keep it up.

Julian
Wales, UK

26 December, 2006

Hi Mark,

I am just starting out PIC Programming for a small project that I would like to get sorted out and came across your site by accident on the web.

I must say that I am impressed.

I was just wondering if you might be a Radio Amateur by the content of parts of your workshop ?
I used to be in the electronics repair trade but don't do much of it these days however the PIC project is revitalising my enthusiasm for this kind of thing

Best Regards

Julian Cleak ( GW4JBQ )

Nico
Amanzimtoti, South Africa

10 Decemeber, 2006

I followed a comment on diyAudio. I must commend you on placing so much attention to detail in the little project. If it sounds good there is no harm in making it look good as well.

balto the wolfdog
England UK

5 December, 2006

Great site, very informative. Interesting, as I have purchased a Musical Fidelity A100 amplifier, with the intention of refurbishing it as a project. Currently, I am having a problem with the selector switch, and would like to obtain a replacement. Thanks for the circuit descriptions.

Regards

Chris

Charles
Portugal

28 November, 2006

hello

congratulations it's great site all is very well explained and we can easy understand
perfect work

regards

charles
portugal

Ben Louw
Singapore

28 November, 2006

I enjoy visiting your site. I bought a pair of LS2a/2s in 1996 and they still give me great listening pleasure.

Adam Boardman
Buffalo, NY USA

13 November, 2006

I own what I was told are the last pair of LS8as - and, therefore, probably the last pair of speakers - the "original" Rogers ever made. They're in great shape, I love 'em, and it's good to see through your site that should they ever break, their ought to be in good, if few hands.

James
Virginia, USA

17 October, 2006

Great site, I found more than I was looking for

Michael Menina
Laguna, Philippines

14 October, 2006

Great Site!!!Nicely done. Now I have something to pattern with my next amp and preamp projects.

Walter
UK

10 October, 2006

Like it

Anh Tuan
Vietnam

5 October, 2006

It is very usefull for me.

Charles McCrimmon
Scotland

5 October, 2006

Nice clean website,

Loved your DIY workshop, found yer website while looking for some inspiration on designing my own hobby area. Was helpful to see how someone else approached it. Also nice to find some PIC resources here, just got myself a programmer but havnt spent any time with it as yet. Waiting on completion of my area to work in.

Gufran shaikh
PUNE,INDIA

5 October, 2006

EXCELLENT SITE

Bob Durk
Ontario, Canada

17 September, 2006

Hello Mark,
I just stumbled across your site and admire the professional set-up and layout.Very nice to navigate as well.I think the main reason I like the site is that I was on it for less than 5 minutes and already found helpfull info.This will help a "Mainly Self Taught" person program in a more logical fashion.
Thankyou for the resourse and I am looking forward to returning to the site (hopefully this evening!!)

BobbyD

Howard
Surrey, England

2 September, 2006

Hello,

I did enjoy your articles on Rogers loudspeakers. I have a pair of Rogers LS7s, bought in 1983, and I have not yet felt any need to upgrade or replace them, they are fabulous and still work perfectly. I found your Service and Spares page useful too, as I guess one day they may need repair.

Regards......Howard

greg angst
Houston, Texas

4 August, 2006

Mark, I like your project which uses four LM4780 chip amps. I am considering building one using 6 LM4780's.

Mark Lawrence
Taunton, UK

2 August, 2006

Nice to see a easy to read site keep up the good work
Mark

Matthew
New Zealand

22 July, 2006

I came accross your site while looking for a pre-amp design. After much browsing and reading, I have to say this is one of the best resources I have ever come accross!

Eddie le Roux
South Africa a small town called Welkom

13 July, 2006

Found your site on Google - this is exactly what I was looking for. Thank you for a super range of articles and links.

Keep it up. Well done.

Tyrmorr
UK

10 July, 2006

I have had my LS7's since I was a teenager, bought them second hand quite cheap.

I never really realised what I had till just recently.

Your site is excellent, well laid out, with a huge mass of useful information.

Jonney
Northern Ireland

10 July, 2006

Mark! What can I say? You have excelled yourself, this site is just what I have wanted for about 10 years, since I stupidly sold my pair of ls7's. I haven't fully explored the site yet and am being forcably removed from the computer by the wife, but will return as soon as I can and continue. Thank you!

John
England

20 June, 2006

Hi, I discovered your site by accident on google and it is exactly what I have been searching for, for years. Thank you very much.

John

Tony Wood
Darlington, UK

9 June, 2006

Congratulations on a beautifully presented site! And thanks for the PIC stuff which I found especially helpful and easy to understand.

Tony

Niko
FInland

1 June, 2006

Absolute great site!

I love your Micro-amp & A4 Power amp -designs. They are just way too cool.
Thanks of inspiration to start building my own LM4780-amplifier. I pass the link when it's ready. :)
Also your workshop is perfect.

Richard Yim
Hong Kong

27 May, 2006

Mark,

Well presented and well updated projects! Excellent introductions with some insights for every reader!

As a fan of ROGERS LS3/5As, I feel particularly thankful for your efforts. THANKS indeed!

Kind regards,
Richard

Dennis Baldwin
East Grinstead West Sussex

17 May, 2006

Hi Mark.

You have a very interesting and informative web site.

I found it as I was looking at LS3/5As on Ebay. I became interested in them after listening to my father-in-law’s and him telling me about them and the history of the BBC’s monitor’s speakers. He has a vast knowledge as he is the original “Golden Ears” a name he was given very early on in his thirty year plus career in the BBC.
Regards

Dennis

Salim H.K
Oman

17 May, 2006

I highly appreicate your Contribution to free learning, please keep it up.

Mike
Australia

6 May, 2006

Hi Mark,

I think your site is really great!

I found this site when i was looking for information on pics, and liked the site so much i read nearly everything else too! I think the pic pages are very well done, although i cant wait until you finish the applications part.

Good Luck

Mike

Alex
Russia, Rostov

10 April, 2006

Good project A4 power amp, good luck in new projects!

Jonathan Roozing
Veenendaal, The Netherlands

7 April, 2006

Hi Mark,

i'm reading your pic programming pages, very helpfull for a pic-noob like me. Thank u very much for your efforts.

Kind regards, Jonathan Roozing

Kim
Waterloo, Canada

30 March, 2006

Well done!!!!!

Keep up the good work.

Kim

Pradeep
India

27 March, 2006

Hi Mark!!

Your works are nice!!:-) Your photographs of your home were outstanding!! I liked them!! Nice work, you're really creative!!

I have a Lab too equipped with some good DSO's and soldering stations!!

Your site was a good uplifter!! It had many basic fundamentals!!

Can I know when the PIC setion will open up!!

Have a nice day :-)

Thanks and Regards,
Pradeep
Design Engineer

Sergio
Italy

24 March, 2006

Hi, your site is class A SITE!!!

I picked up many information to enjoi my A1 in full rate.
Only one thing..... my A1 is 1990 edition with holes in the lateral shield but I have no prolem with the Alps pot.
Anyway, I made an upgrade with a motorized alps pot and I added a circuit in order to change the volume with a remote control. The value of the pot is the same and naturally the sound too. I think that the pot on the reaction on the opa is a good solution, maybe not the optimum for the noise :-)).
The capacitor are all changed but I have not eard sound improovment. It's true we start from a good start...

SOMEONE CAN TELL ME IF IT IS DANGEROUS TO CONNECT 4 OHM SPEAKERS (dynaudio audience 52) ON THE A1??? It's a week I'm doing and it seems works good... but a long term???? Thanking in advance.

SORRY ABOUT MY ENGLISH..... CIAO!

Steve Brown
Flintshire Wales

20 March, 2006

Great site the best i have come across. The audax monitors
look superb. A few years ago i entered a competion in HIFI
CHOICE to design a speaker it was run in conjunction with CYRUS

I designed a mini monitor made from birch ply and although
i did not win I was invited down to cyrus for a tour of the
factory.Sadly I could not go as i was on holiday.

Mark how about a revamped jpw mini monitor?

STEVE BROWN

Francisco Javier Olvera
Puebla, Mexico

16 March, 2006

Great site! Your Pic tutorial is one of the best explained tutorial I have seen. I am waiting for your applications future section...

Greetings

Derek Rogers
London

16 March, 2006

Hi just a quick comment! It`s 3.25 am and my daughter sent the link to your site.

I am one of the two sons of Jim Rogers who created the first Beeb loudspeakers and went on to produce his own Jr149`s and many others!

Just skimmed through quickly but I shall return!

Are a fan of dad`s amplifiers as well?

Regardz

Derek Rogers

Darrin
Australia

11 March, 2006

Your site is first-class, as is your design and workmanship, i am totally in awe of your talent.

Regards

Roland Doucette
Gilbert, AZ

11 March, 2006

I too share your joy of the ultimate sounding and greatest engineered speakers ever owned. I purchased a pair of RSL Studio Monitors from their store in Conoga Park Ca. in the early 80s. The speakers were assembled right in the back of the store. I was sooo impressed when the sales person gave me a tour.

Anyways, they could be turned up VERY LOUD (like I did on occasions) and they NEVER failed me. The speakers had just recently been unplugged and put in storage, until I figured how to configure them into my garage. BUT alas my wife put them out for a garage sale and asked a whopping 5.00 for them and they were sold....I still cry at night

David Payne
Clanfield Oxfordshire

20 February, 2006

I very much enjoyed reading the info on Rogers speakers. I have used a pair of what I think were Ravensbrook bookshelf speakers I bought in 1970 until a few weeks ago when one of the base drivers "went". So a decided to replace them. These had 8 inch base drivers and twin tweeters as way back then if a loudspeaker enclosure had three or more drivers in it was purchase tax free(this loophole did not last long.) They are now retired to our spare room but I can't keep them there too long. If you know anybody who would like them as spares drop me an email. Somewhere I may also have a Ravensbrook amp with one switch button missing probably swallowed by a hungry daughter so beware!

Cheers David Payne

Scott James Bartlett
Oxford, UK

22 February, 2006

Hi Mark,
I recentley joined a copmuter firm in the workshop. As you can imagine lots of nice toys to play with. Anyway. I had never built or soldered amnything and decided to have ago. 1 year many velleman kits later, I wanted to build an amp for my PC. I used 2 LM3876 IC's from the overture series and it worked first time. Yippee!! The sound impressed as well. I did this without any online info and since looking at the "gainclone" sites I made a very sloppy job <including a very dodgy headphone socket circuit using a relay with 8ohm 50watt power resisters as a dummy load>. So I'm going to try again.
Your site is the best I've seen and would like to thank you for taking the time to help others.
I'm thinking of using 2 LM4780's for a power amp, what say you? <remember I'm just a fledgling>
Cheers,
Scott.

Lee
Kent

21 February, 2006

Just been browsing for info on insulating workshop floor and found your site. brilliant ideas and photo's more informative than some books. i will be back for more tips in the future, keep up the good work. Lee

Mike Restall
South London

17 February, 2006

Thanks for the tip on turning the cabinet over to test for a sagging bass driver.

I found a pair of LS7t's abandoned on the street yesterday.

Dragged them home full of hope only to find one of them popping and clicking away when I hooked them up.
Dishearted I began to trawl the net for any sign of a replacement. You can guess the rest.....

Thanks again. They sound lovely!

Gunther
Belgium

8 February, 2006

Nice things you have over there, I really want to be able to build those myself too, robably within 10 years or something like that ;). I've also noticed your new family member, cool, he is born on the same day as I am :p

Lars Willeboordse
The Netherlands

6 February, 2006

Just wanna congralute you and your wife with your new baby boy.!! he looks gorgeous:)

Thanks for the site also because i use it all the time as a reference for my own projects

Kind greetings Lars Willeboordse

p.s. i would love to see pic-section expand;)

Pedro Martins
Portugal

3 February, 2006

Congratulations!

You have now a kid to care! I have mine on the way!... Next June he will be with us! That makes more two audio/electronics fanatics!

Cheers!

D. Luijten
Den Haag, Netherlands

7 January, 2006

Hi, I found your site a while ago already and am planning to revise my A1-X the same way. Thnx for the tips and instructions.

and Byron: try the Eagle PCB design software. It is free and is working quite well. I use it at my university too.

Daan

Byron
South Africa

3 January, 2006

Hi Mark!

I thought I'd let you know that I've found your pre-amp project supremely inspiring. I stumbled on your site while trawling for ideas on how to design a multi-channel pre-amp and suffice it to say your use of a PIC Microcontroller and digital peripherals has given me a good idea of where to go. My biggest issue is practical and easy to use PCB software. There are so many offerings, but none of them seem to be ideally suited to the DIY user.

Anyway, thanks for posting your experiences and keep it up!

Pravardhan
Bangalore, India

25 December, 2005

Hi,
Well, I liked ur home page & ur works are clean & neat.
I read ur articles & they are very good!

Bye,
PRAVARDHAN

Alfredo Gaggero
Uruguay

22 December, 2005

Really a fine place ,with a handful of information about pics and other stuff. Well done folk!

Simon Jones
London

19 December, 2005

Lovely site! Came here on a search for "dual tracking bench psu" and ended up browsing for ages! I'm just reviving my long dormant electronics hobby and obviously a decent PSU is the first thing I need... I'll probably nick some of your ideas if yoy don't mind.

Got lucky with a scope... found a Tek 465B on the street next to some rubbish bins. After letting it dry out from the rain and reseating some of the socketed transistors in the timebase section it seems to work fine!

Love the Audax monitors, they really do look gorgeous.

Simon

joao cardoso
Portugal

14 December, 2005

Looking for PIC chips i found your site. It is a great site with a lot of good explanations.
Congratulations
joao

Peter Mulholland
Norwich, UK

13 December, 2005

Good to see you're finally settled in your new place. Having moved twice fairly recently I know what hell it is. I'm glad you made it through OK.

Looking forward to some new stuff to read about from you soon :)

Stew
Alberta, Canada

7 December, 2005

Well, I've lurked onto your pages before, and have seen your handiwork as well as others, via diyaudio.com.

I must say that my DIY efforts pale by comparison, but at least we have the same taste in books (Is that Horowitz and Hill on your bookcase?). Nicely constructed, without a bunch of "audiophile" type discussion. I could be classified as an "audiophile", but there is SO much pretension built into that label. I've been a proponent of good doesn't = expensive (all the time). There are some true bargains out there if one wants to have fun and enjoy music rather than equipment.

I find that simplicity in design and execution is what we should all strive for (the "Zen" thing if you will). Might I add a minor criticism? An extended listening impression or conclusions area would be nice and of course comments of use with different loudspeaker types if possible. Nice page, and very straight forward without any "flash", again good basic design. Thank you for your contribution to truly good content on the Internet, and specifically the clarity of language and the restricted use of "flowery" language. :-)

stew

Kris Dissanayake
Sri-Lanka

2 December, 2005

easy now! superb design. specialy well organized!!

i'm curretly learning pic programming!
thinking of making digital controled sound processors for uk market! ST ics will be used! i hope i could reach my goal one day!

keep up with your works mate!

Matt Meyer
Los Angeles

26 November, 2005

So I purchased a set of Rogers Studio1's back in 1988 w.o realizing what I had. I've loved them.

But now, with all the new technology and wonderful speakers out there, I am thinking of upgrading my home theatre. The question for you folks is -- would you replace the Rogers (No, I am NOT selling them!) and if so, with what?

Thanks,
Matt

Naresh
India

22 November, 2005

About your website -Inspiring and Innovative !

James Power
Ireland

4 November, 2005

Well done .
A very well put togeather site good simple information
about a subject which can be very complex.
Look forward to useing the site in future.

Todd J
Vancouver, Canada

25 October, 2005

Great DIY information. Very insightful and informative. Thanks a million!

Vikash
Dunstable

14 October, 2005

Ello mate, just checking in to see what you've been up to recently. I was quite proud of my P2P LM3886 till I saw your LM4870. Grrr. ;)

As always, I'm leaving inspired...

Alex

13 October, 2005

Good site, very nice project pre amp.

Helen Holt
Surrey, England

9 October, 2005

Excellent site. Been looking on Ebay for speakers to replace my existing ones, and had been getting very frustrated with trying to find reviews of some of them. Been thinking of trying to get some Rogers speakers for a while..great to find such useful info. At present am using some prototype Tannoy speakers (dont think they actually went into production) with my homemade (not by me!) triode amp and currently using the phono stage of a Marantz tuner...in midst of building a tube one myself.

Dave
Argyll

8 October, 2005

Your garage conversion project has given me great ideas for mine - and enthusiasm too! Many thanks.

Steve
England

4 October, 2005

This is a good site best I have seen. I know jack about the PIC but it is helping and going in, in dribs and drabs.

Thanks

Steve

Gilbert W K Lau
Hong Kong

2 October, 2005

Dear Mark,

Thanks for the articles, the site. I really learn a lot from here. I also have a MF A200 Signature, which was my first Amplifier back to more than 18 years. I still keep it as one of my collection as an invaluable item. I keep it clean & tidy as a respect it this fine product. It is my good company ever.

I appreciated your view in article regarding ATC20SL, because I am going to buy this product from Audiogon. & I hope I will keep it after 8years of time, like your good friend Richard. Changing Hi Fi gear or you may say "Buying & selling Hi Fi products" is my ONLY hobby. I should say searching for SOUND EXCELLANCE is not a simple game. You need to make a lot physical test by serious audition for all of them, before you can make fair & honest comments.

I did not have knowledge about ELECTRONIC ENGINEERING, like you. So I try them physically to have the test result by hearing & trying different combination of different items to look for sound quality improvements.

I really appreciated your effort in making this site for those guys they love or like Hi Fi. Without your effort, we will not for sure have such a good view about those items.

Looking forward to having more article from your end. Thanks a lot.

Warmest Regards

Gilbert Lau

Richard Senn
London, UK

28 September, 2005

Excellent site, very informative, superb info that doesn't exist elsewhere.
Keep up the good work.

greg mitchell
Surrey

12 September, 2005

Great site Mark,

Just revisited the world of Musical Fidelity with the A100 amp. I used to have an A1 back in the 80's and had forgotten how good they were and still are!. So far my LP12/Lingo/Ekos/Arkiv and my Roksan Xerxes/SME V/AT-OC9 have had me smiling, both running through A100's phono stage which, imho, puts many outboard phono stages to shame, I kid ye not!

Just got the nerve up to open her up and low and behold half a tonne of dust (glad I did read through your site otherwise would not have known about heat sink compound!!)

Now looks as good as new and thankfully both fans are spinning freely without dodgy bearing noise - yes the fans are going to make a noise but so what? turn the amp up a notch and just forget it.......before you know it its 7.00am, break a couple of eggs and some bacon on the heat sink and keep on smiling.

Alan Parekh
Canada

11 September, 2005

Nice projects, I like the battery monitor...

Alan

Jan Rasmussen
Denmark

29 August, 2005

Nice page Mark.
Like the layout and content :)

Jan.

Brett
Brisbane, Australia

27 August, 2005

I love the work you have done.

I am 13 and always looking for somthing new to do i save the projects into word so i could print them out a school.

keep up the great work

Brett

Tony
Crawley, Sussex

25 August, 2005

I have been into hifi since is was 13 and have gone through numerous setup including a thorens michell hydro referance rotel, and a & r amps to cd players os various dubious quality but because vinyl became hard to get Doh! ??

so one day im looking in a dodgy seconhand shop window and saw a pair of rogers studio ones on rogers stands these were the stuff of dreams when i was 17-22 so parting with 125 quid i took them home polished out the scratches goodbye mordaunt short ms25i pearls wow i had a pair of sony apm22es which klled everthing around but these ageing rockers blew them away the control was unbelivable ive now gone full circle managed to get a vellerman 4040 4 kt88 driven valve amp 45 wpc pure class a reengineered by an old GEC chap who built it this is fed by a denon 1905 for just the main left and right its a digital 7.1 job but very good a nakamichi av10 bridged powers a wharfdale 12" sub

the pride and joy is a systemdek ii ex with a linn basik and goldring gx1012 which i prised out of a sellers hand for 150 quid when i was a teenager this lot would have cost a years salary now i can fully apprecaite the quality of sound that went into vinyl. the rogers are too clinical for ordinary CD the amp does soften sound a little but produces around 40 amps thats a lot of punch watts dont matter with valves. DVD audio and SACD are ok but vinyl is king rogers deserve vinyl and valves

Boris

1 August, 2005

You are the best...

I did it...New A1...with separated PSU, loudspeaker protection, Alps, WBT, Cardas, good capacitors...

Fantastic smooth sound, a lot of temperature and that's it...

Best regards and all the best

Thank you for all your support

Boris

Michel BOIMARE
FRANCE

23 July, 2005

Thank you for this pretty job and explanations (as usual !).
I just received two LM4780 samples from NS. I know how I will do now !

Tim Gasser
Oxford, England

13 July, 2005

Excellent website ! There are some great projects on here.

Peter Garmidolov
Bulgaria

15 June, 2005

Excellent learning materials for PIC programming for a beginner like me.

Justin Stapleton
Bedford , England

13 June, 2005

Great site. Just bought an A1 for £49. It has noisy volume and selector pots. Seems a common problem. Having been engrossed in your site for the last 30 mins I mat well bone up on electronics !!!

Nick
Bedfordshire-England

1 June, 2005

Excellent site-thanks

Morten
Sorø, Denmark

25 May, 2005

Great site. Very informative. I read and learn a lot about programing the PIC16F84

I hobe you vill make more pages.

God side. Meget informativ. Jeg har læst og lært meget om programering af PIC16F84

Great work and keep it up.
Cheers, Morten.

Bernard
California, USA

17 May, 2005

Great site. Very informative. I just acquired a pair of Rogers LS6 and I am blown away by them. I am using them as monitors for my home studio. They seem to be extremely true and it is amazing how much bottom you get from these, they are light in weight. The black cylinder that fits into the bass port had come loose. I put them back in place. The side that is in the speaker I put the cut away side face up. I think that is right. Do you know for sure? Thanks. Keep up the great work. Bernard

Michael Perini
Bucks County, Pennsylvania USA (near Philadelphia)

9 May, 2005

Love the site, You obviously put a great deal of work into it, Thank You.

I am a retired financial services exec. who has the luxury of developing just enough knowledge to be dangerous in a number of topics. My son David is a recording engineer and producer who is begining to develop some substantial credits (Maria Cary, luthor Vandros, Pat Metheny, original cast album Hairspray ). He worked for several years at one of New York's largest recording studios-Right Track Recording where he had access to the finest equipment, - their newest 5.1 control room had Soffet mounted Genelec mains that cost over $250k US. So when he went out on his own he had golden ears with an aluninum budget. Therefore he setteled on the obligatory Yamaha ns10's for nearfields Tannoy 12" Dual Concentrics for mids.

On a lark one day I pulled out my 20 year old Rogers Studio 1's -- and everyone was BLOWN AWAY . He used them for several months ( always at reasonable levels) and one day one speaker was dead. No sound at all. We've been looking in vain for a repair facility who knew the speakers to no avail. Afraid to trust them to somone who might repair them but change their voice.

So they've been idle for a year. The NS 10's have been replaced /augmented by a new pair of Genelec 8050's at $2000 US each. They are spectacular nearfields but a bit clinical (as they should be) when compared to our memory of the Rogers. It seems to us the combination of the Rogers & Genelecs would yield Spectacular Mixes.

Goran Poprzen
Calgary, Canada (close to North Pole :)

22 April, 2005

Hi, Mark
I found your site very informative. Lots of good links, too. Well, we bought a house two months ago and right now I'm in the process of planning how to setup my little electronic hobby workshop in the basement. If you don't mind, I would like to use some ideas from your DIY/workshop pages.

Cheers,
Goran

john boyles
oxford, england

15 April, 2005

hi
bought rogers ravensbourne when it appeared,it was a very
good amp in its day.the variable slope filter was very
useful for taking out background hiss on vinyl and would
still be useful on amplifiers today i remember it worked very well with celestion ditton 15's a good alternative
to rogers speakers are the older spendors(bc1) or harbeths
all built to bbc specifications

Robert
Melbourne, Australia

7 April, 2005

Hi Mark,

I have only recently become aware of your website after acquiring a pair of Musical Fidelity ma50's. One of which needs a mains transformer replaced. I am told by the local repair people (recommended by the distributors here for Mus.Fidelity products) that they cannot trace one here. They have also said that they are trying the UK but don't know whether they can source one there either. I have'nt even got to listen to them at home yet!!
I wonder if you have come across this before? I imagine I could have an external transformer fitted to each if it goes that way with the supply of these parts.

But back to your fine efforts as a web host! This is a very impressive site with more information on the featured items that the manufacturers would ever include or be bothered to tell us. Your passion is evident in bundles.

Great work and keep it up.
Cheers,
Rob.

Stewart Emmings
England

5 April, 2005

Hi There;

Most informative - as an owner of 2 original pairs of LS 5/8 loudspeakers with AM 8/16 amplifiers I learned much of some of the problems I myself am experiencing with the units as they age although it has to be said my main pair function perfectly. Many thanks for the detail on the Quad 405's!

Paul Toye
Brighton, UK

1 April, 2005

Hi Mark, I've found your site very informative, especially the Rogers section. I have run a pair of LS7t's for years with an Audiolab CD & Cyrus Amp/PSX and think they are just brilliant. I recently went "AV", bought a monster Rotel processor/amp and have considered changing the speakers for a surround package. Everything I've heard so far is simply nasty (PMC, KEF, etc), hence I'm trying to find a centre speaker that has a similar tonal balance to the good old LS7t's. Has anyone contacted you with any possible suggestions (except for another LS7t as I don't want that big bass driver magnet anywhere near the TV screen!). Many thanks for the good reading, Paul

T.Q.Choudhury
Dhaka, Bangladesh

1 April, 2005

Dear Mark,
At the risk of looking overjoyed, this is one of THE BEST site I have seen. Logical and very informative.
A beginner that I am, I am still groping at the File
adressess. To be precise suppose that I want to declare
any variable say Count, is it onnly the GP registers that I can use? i.e Count equ 0Ch, or 0Dh etc. In some places
I have seen declaration like: Count equ 08h.
Perhaps you couls add a few para on variable declaration to make your tutorial more complete
Thanks

Jonathan Darker
South Africa

12 March, 2005

What a supprise!!! Nice treat....

I am looking for reviews on Musical Fidelity "The Preamp" , "Typhoon Power amp" and "Tempest Integrated Amp" as well as the MF CD2 review and specs... I am the proud owner of all of these products but never recieved any manuals as i bought the components 2nd hand...

Tomy
Indonesia

3 March, 2005

Good Site's

Dave
U.S.

3 March, 2005

Mark, you have put together an excellent tutorial on PIC micros. I have downloaded the suggested applications and intend to build the programmer from the schematic you featured. I am also interested in interrupts as another reader is, and also A to D conversion.

Paul MacLeod
Bristol, UK

28 February, 2005

Fantastic. I learnt more over my lunch break than I did all weekend.
Just one thing, 'Interrupts'.
Ah, well. I'll just have to keep searching.

Thanks very much,

Paul.

Burhan ISIK
Turkey/Istanbul

14 February, 2005

Dear Mark;
Thank you for the lots of valuable informations about PIC programming. I have found it excellent for the beginners of PIC programming.
I am looking forward to seeing the completed part of APPLICATIONS SECTION. I would like to do more than LED switching.!

Thanks again.

eric wardle
Woking

11 February, 2005

The pair were bought from new around 1972 from chew and osbourne in essex.

Using a CD test disk with Cyrus Quattro + Cyrus Q power amp (50watts) revealed a good base, mid range a bit scratchy, and super treble fine.

After around half an hours run, things improved and it sounded very respectable- and that's running just one speaker

I am so impressed that I am contemplating tidying them both up (internal wiring very thin, outlet sockets replace with proper screw terminals ) providing the wife can be persauded to have them back in the lounge (luckily they are in good shape, teak with a black/gold material on the front).

thanks for the potted history of the rogers.

Eric Wardle

andy patel
UK

3 February, 2005

Stumbled on your website by accident. Great Rogers section. The info on your website is clear, concise, without padding !

I have been using Rogers and Quad from the begining (Cadet 3 and Ravensbourne amps, though feel sorry to have disposed of them then. Quad 33/303 and 34/306 still in use today). Always had Rogers speakers from the begining because of their sound. Wonder if anyone remembers their Wafer speakers. Have been using Studio 1a for the last 12ish years, without any problems, apart from cabinet re-finishing with teak oil. They sound best standing on bags of sand (aesthetically concealed ofcourse) in fact any 'dead' ganular material like bags of salt used in water-softner, or 10 KG bags of grain etc.

Rusty
UK

27 January, 2005

Excellent site. Keep working on the applications I need all the help I can get!

Rob Heijnen
Netherlands

26 January, 2005

At least i found some information about my loudspeakets , and i like you'r site very much.
Please go on with you'r site ,i wil meet this site a lot more now i know it . And i wil put it to my favorits .
Thanks Mark ,regards Rob

jean claude fourriere
France

23 January, 2005

HI !

I just read about ROGERS on Internet I was the french importer of ROGERS products from 1973 to 1978 or 79, I don't remenber exactly, with the company I create for this products, VALOIS DISTRIBUTION !
Th "Revue du Son" gave very good tests about LS3/5 and Rogers BBC MOnitor at this time.
I made also DECCA inclosures with there ribbon tweeter, and also an home made audio reference.
My company stopped in 1986, and I restart in 1988, by building large cold plasma speaker called Tolteque AHL, and electrostatic game with the same name.At this time, I try to sell improvement about electrostatic loudspeaker for efficiency, bandwith,reliability, in USA.
Thank you again for the interest about ROGERS.
Jim Rogers was a good man, and I like his large ribbon midrange/tweeter he made at home
Yours sincerely

JC FOURRIERE

Ken Owens
Addlestone in Surrey UK

21 January, 2005

Brilliant site Mark, can't wait get hold of an A1 to mess about with. Using a couple of home built EL34 PP monoblocks at the present time. I have quite a lot of Sony gear as I used to work there as a bench audio engineer (we could get it cheap graded stock).Surprised you did not like the DTC1000 Dat machine, we used to get a lot of these in for service from professional studios like EMI. I use a much later machine and I think it is great. Also have the 510 minidisc which is awful, the transport problems were caused by the microswitches which used to go O/C. Thanks for a really good read, about the best I have seen. I will keep returning to see any updates, I find it hard to believe that the Gainclone can be that good, we used to use a lot of the LM O/P i/c's in the cheaper Sony gear, but I suppose don't knock it until you have heard it !!!

Paul
Clacton on-sea, Essex

16 January, 2005

Hi Mark,

Thanks for doing the site on ROGER SPEAKERS, it's been a joy reading about all the different models there were i did not know there were so many that they had made.I once had a pair of LS4a/2 speakers and i loved the sound of these(my dad owned them but passed away some years back so that's how i got hold of them),any way after some time of using them my dear young son decided to blow them up for me this caused the main drivers to give up"i have still got the tweeters,and crossover in my garage stored up as spares".I have been looking everywere for these speakers eg:hi-fi mag's, internet etc,etc there was one time i saw these speakers for sale that was in a hi-fi mag i think they were going for £70 somewere in london but i lost the sale on them.Well i shall keep looking for them or the next model up from the LS4a/2(not sure which model that is),i now have a pair of MONITOR AUDIO silver 5i these sound nowhere near as good as the LS speakers.Well thanks for reading this email and keep up the good work,
yours sincerely
p clarke

O.W. Gilmore
Ottawa, Canada

6 January, 2005

This winter, I decided to learn about PICs and in particular the programming of same. Your site has been the best one yet to get a feel for PIC Programming. I am book marking your site with the intent to visit it on a regular basis for further Programming lessons. If you do add more on the PIC, I would be interested in "interupt operations".
Keep up the good work!

Sheraz
Pakistan

28 December, 2004

I like the site it is good for people who are just starting and exciting enough to rouse up the lazy electronic hobbiests.

Sean Pan
TAIWAN

27 December, 2004

Nice job, well done...

Gen
Australia

21 December, 2004

Great site Mark, it great to see someone so passionate about speakers. I have just bought a pair of secondhand Studio Ones off my sisters new Husband and they sound fantastic with my Marantz SR6200, but I do find that they are lacking in the midrange when it comes to electronic music such as the Chemical Brothers.

Cheers
Gen

Caloy
Philippines

7 December, 2004

Hi Mark! The layout of your site is more organized, but I have to tell you that I was rather sad to see the old site go. I don't know, I just liked the "vintage" feel of the old site.

Anyway, I'm glad to see you added some additional info on the speakers.

Good luck!

Philip Barsalou
Canada

7 December, 2004

I very much enjoy your site, your designs are very clean. Your preamp is my favorite. Keep up the superior site and work.

Phil

Dick Cappels
Mesa, Arizona

29 November, 2004

Its really nice to see DIY analog projects on the web. I enjoyed looking over yours.

Dick Cappels
www.projects.cappels.org

Frans Heuvingh
Amstelveen (near Amsterdam) Holland

17 November, 2004

Although U dont know it yet, your helping a 80 year old radioham (PA0LIZ) on the subject of PIC programming.

Winz
Thailand

13 November, 2004

.....I just want to known how to design a pre amp circuit....

Claus Wahl
Norway

6 November, 2004

Nice web design, Mark.

I also admire your well organized work on the preamp - the technical solutions are in many ways equal to mine, but I feel you have allocated much more time to the project than I have. May I steal some of your I/O filters?

Have been using 8mm character LCD on the prototype and it is just not legible in all lighting conditions. Next approach will probably be a new graphics color LCD (just for the fun of it).

Keep up the good work!
C

Ant
South Africa

30 October, 2004

Hi Mark
I've been looking for good, solid intro stuff on 16f84's for a loooong time now - I've only just started reading your info, and it seems to be exactly what I'm looking for, so I'm writing this before I even read further to thank you!
Good stuff
Cheers
Ant

Mark Mathewson
England

24 October, 2004

Nice one! I've found the sections on the pre-amp especially useful. I have a set of Hauppauge MVPs; the main one sits under the telly in the lounge serving audio and video from my Linux fileserver / DVB-T card setup in the garage.

I've just set up an AVR-controlled LCD interfaced serially to the MVP so I can select and play audio without having to turn on the telly. But I use an old NAD3130 amp (modified with a couple of extra channels for surround) which has no remote.

I'm not bothered about source selection, but I do need remote volume control. The MVP is rubbish in that respect - about 20dB steps it seems (!) so I want to extend the AVR LCD interface to also control analogue 4 channel audio and use it for both MVP sourced stuff and all the rest by sticking it in the pre-out power-in loop on the NAD.

Your pre-amp project has given me exactly the analogue volume control pointers I need. Many thanks for that.

And if you ever get around to the Monoblocks.... I could really do with some more power egor <g> for my MS914s - they're fairly efficient but need tight bass control as although they go low, they have a tendency to waffle. Bi-amping is very much on the cards.

Anyway - sorry for the long-winded drivel, but appreciate the site. Keep it going!

Martin
Bromsgrove, Worcs

19 October, 2004

I bought my A1 back in 1988 and have used it constantly up to last year when I finally replaced it (with an Arcam).

Because I still love it so much I couldn't bare to sell it and as it still works perfectly I've put it back in its orignal box and even found a pristine brochure and the orignial invoice of £279 that I paid back then...

Marcus Ackel
Internet

12 October, 2004

I love this amps (owner of 3) and i love this site
and Mark is a very nice guy (expert).

Greez Marcus

Sung
New Zealand

11 October, 2004

Excellent redecoration with richer info!! Well done, mate!

George Nogalo
Canada

2 October, 2004

Just got on...I am sure I will learn lots!

Mystery
Philippines

2 October, 2004

its nice to be here!!!

Damien
Cornwall UK

24 September, 2004

nice site n usefull piccys.. tavery much i am looking at upgrading my epos es11's to scm20's n you have helped make my mind up! ta.

Manuel Luis D. Dionio
Philippines

21 September, 2004

It is a highly informative site. Thanks a lot.

Nick Whitehead
Beds-UK

12 September, 2004

Excellent site, very easy on the eye.
Great job!

Peter Mulholland
Norwich, UK

9 September, 2004

Excellent site, even better now it's redesigned. I like the new clean scheme!

I eventually plan to incorporate some of your preamp ideas into my home brewed integrated amplifier, specifically the PGA2310 control. It will be controlled by an Atmel AVR though as I hate the PIC's lousy programming style.

I saw you are moving again, it must be horrible to part with that lovely workshop! I'm still trying to convince my girlfriend to let me have a large shed to use :)

Pete Greenwood
Darkest Dorset

29 August, 2004

Hi Mark,
Absolutely top site !!! - astoundingly good workshop conversion stuff !!... your pages have provided a great deal of the ideas and inspiration for a similar project which I am currently undertaking. Good luck with house (and workshop ?) #2 !!!
Cheers,
Pete.

David Burt
Wilmington, Delaware USA

24 August, 2004

Mark, I was fishing around for info on a pair of small Rogers speakers, and ran across your AMAZING page. I haven't had time to scour it for what I really need, but reading your description of the Rogers LS-2/X blew me away. Clearly there will be more here than I could ever comprehend -- a GOOD thing.

I am a bit of a dilettante in the world of tube electronics, with all manner of accumulated stuff lying about, mostly ancient things that now represent the bottom of the high end: McIntosh MC40 monoblocks (my favorites by far, especially with the GEC KT66s), a pair of MC60s (ballsy but also very glassy -- don't like 'em), a custom stereo thing made by a guy in California who is a real artiste (SORT of a MC-240 knockoff, not really) and a few low-end tube preamps.

Richard Game
Orlando, FL USA

24 August, 2004

Hi,

Excellent site!!! Very interesting.
I found it by searching google for 'ATC SCM20' - I have just bought a used pair of the active ones and I am very impressed.
Unfortunatly I cannot crank them up as i am in an apartment until november when our house is finsihed.

Regards

Richard

Helen
UK, Plymouth

23 August, 2004

Hi Mark

I too am a Rogers fan and have a much loved pair of Studio 1 speakers, it's nice to see other visitors here with these speakers, they are rare on the second hand market so it must mean that when we have them we keep them. Sadly I loaned the proper stands to my brother (who lives 300 miles away) and am committing the cardinal sin of using a pair of Rogers Ls4a speakers as stands for the Studio 1's. Looks bloody nice though, elegant black column with the Studio 1's running nude without their grills.

Regards and best wishes to you, Helen

Rick
USA

22 August, 2004

I like your site:
I need a copy of a Telequiptment D67 Oscilloscope manual. I hope some of your visitors to this site can help me find what i need. Keep up the good work. Regards, Rick....

Eric Penot
France

10 May, 2004

Hi Mark,

Very good site. Very good informations. I have used a CS3310
and plan to use the PGA2310 in a new design...

http://electro.diy.free.fr/

Regards

Eric

Ayn Marx
Australia

16 April, 2004

Extraordinarily interesting and eccentric site. Came looking for information on Rogers LS3/5A's but hung around and read most of it.

Site loads & reads faultlessly on Safari for Mac OS X.2.8 & OS X 3.2.3

Steve West
New Zealand

1 April, 2004

Great Site Mark,
Im getting ready to convert one of the bedrooms in my house into a workshop, Your one has inspired some good ideas thanks :)

Paul Fredrik
Arnhem, The Netherlands

20 March, 2004

Great site Mark!!!

Much nice pictures, very interesting projects and easy written!! Discovered my attraction for the quad 405 again too!

Chris Homer
Eastbourne, UK

27 February, 2004

Dear Mark

Nice to see some Rogers stuff on the net. I bumped into your site a year ago, and have only just got round to revisiting it. As a teenager in 1983 I bought a pair of Studio 1s (still my main speakers in my lounge) and recently also inherited a pair of LS2s which my dad no longer wanted! Later as a professional in the computer games industry I set up two studios, one for Philips where I bought LS5/9s and then for a company called Millennium in Cambridge (later bought out by Sony) where I bought LS7Ts. It's a great shame they aren't still around. I went to the Swisstone factory in Mitcham many times, and always received fantastic service. One day I will have the money to demote the Studio 1s to my second pair of speakers, but I've kind of got use to them now ...

Regards

Chris.

Maarten van Casteren
Cambridge, UK, although I'm Dutch

30 January, 2004

Nice site and a very nice page on the ATC SCM20's I just bought a pair second hand and I'm going to pick them up on Sunday. Can't wait! It is the old model, though, so not as nice as yours.

I am a bit amazed that you are driving them with an A1. That must be the most unlikely amp for them, but if it works it's OK I guess. I just hope that my Electrocompaniet ECI 2 will be up to the job.

Did you find out the values of those inductors in their cross-overs in the end?

Thanks,

Maarten

Vladimir Konev
Belarus, Minsk

29 January, 2004

Hi, Mark!

It is a very good site!
A few monthes ago I made a 5-chanells power amplifier based on TDA7294. The results are good. Now i'm searching some matherials about digital volume control and etc.

Your site is the best about this theme!

massimo
Italy

18 January, 2004

great site mate! good job, i'll be back soon!!!!!!!!!!

Kelvin Chan
Hong Kong

18 December, 2003

Hi Mark,

It's a really site and I learn a lot from it, keep up the good work.

Kelvin

Sándor Róka
Hungary

22 August, 2003

Hi Mark !!

It's a very good site. Found when seeking manual for old scope, Telequipment DM63 !! Do you have any information about it, circuit diagram or something. I'm trying to revive it... You are an accurate person and you could have a lots of free time. :-) !
Keep it up !
Best regards
Roka

Mike Drew
UK

30 October, 2003

Hello Mark
I stumbled across your website, whilst brousing the net (which I do infrequently) for information on Rogers speakers. I too own a pair of LS2a's, and use them as the main monitors in my music studio, together with a Musical Fidelity A1 amplifier. I find this combination very hard to beat, having heard set-ups in other studios. The sound is so natural, without any use of tone control, which is exactly what you need for this particular application.

If it came to a choice between the speakers, or the wife, I think I'd be waving her goodbye!!!

Mike

Jonh Taylor
UK, NW England

21 October, 2003

Yes, yes JLH good stuffs.
Have built 75 watts stereo amp in 1976 and still going strong. This kit was originally bought from Powertran. Still prefers the sound from this rather than the 400 series 45 watts. What is good from 400, is the AM/EM tuner. One can tell the difference bandwidth/depth from different BBC relay stations throwing out the same programs and they say BBC is quality! Some of the independents have better fidelity and banwidths. Having only two stage Alps tuning heart (still remarkable however). I am going to try Larsholts 5008 Varicaps front end.
Anyone else tried this?
Regards
John

Andrei Azzopardi
Malta

16 October, 2003

I'm out of words! Your site is excelent and very nicely explained. I'm still a beginner but I'm gaining knowledge for the time being (theory) so that to use it at full power when actually building circuits. I'm interested in the GainClone amplifier which would most probably be my first circuit. Since I am a senior computer developer, I would also like to try the PIC controllers.

Thanks for a great site and keep up the good work!!!

Fred Pratt
Ravenstone Leicestershire UK

8 October, 2003

Hi Mark,

This is my second e-mail reply, the first relating to PIC Micros.

Haven't fully looked at all the content,however. am absolutely fascinated with this web site, excellent is an understatement.

You are a man after my own heart, in that reading of your interests, and looking at your workshop, is like looking in a mirror. Your Parents must be very proud of their son!!

Thanks again,
Fred
  (Lawrence F Pratt)

NB How the hell do you ever get the time to do any work ?

steve depoix
Southampton

26 September, 2003

Yeah, site very good and easy to navigate around. Your collection of sound eqpt quite interesting and similar in a way to mine. I've gone for good quality older stuff too, Quad, Tannoys, Thorens/Sme, Revox A and B77's etc . Would tactfully suggest you try a more solid mount for the turntable and get it off the pine shelving...but it does look like you've had your hands full over the last two years doing the workshop and shed etc ! :-)

Once again, great site

Well done !

raffaele fontana

22 August, 2003

Hi,

i'm looking for Rogers ls5/9 and if possible stand FOUNDATION Designer for ls5/9,ls3 and studio3. Can somebody help me?

bst rgds

Jacques
SA ,Pretoria

18 August, 2003

Great site!

I am currantly studying Eletronic Engeneering and found the site very helpfull with my assighnments.

Thanx!

Jake

Rob Cartwright
Wirral England

10 August, 2003

I am sitting here working and looking for battery monitoring equipment. Stumbled across your site and have been looking at it for over an hour!!!!

Very good effort indeed!

Very interesting but must go now and get some work done. (Yes it is Sunday morning, I am self employed so work is 24/7!)

Thanks
Rob

Tomas Karlsson
Sweden

1 August, 2003

Thanks for your site. I love the preamp project and has got lots of ideas from your design. Keep up the good work.

Tomas

Jerry
East Sussex

16 June, 2003

Hi Mark

recently acquired a pair of Rogers LS7's speakers they dont seem well suited to my CD player or perhaps one of the speakers is damaged i dont know? the bass response doesnt sound that good on one channel. Cant get the cover off to check for damage. Sorry Im rambling any way great sight and thanks for info on Rogers speakers. Are rogers still in bisiness if i need to get them repaired???

Again thanks

James Hill
Bristol, UK

15 June, 2003

What a great site!

Wish i had the time and ability to do something like this, Also you seem to actually finish your projects!

Best Regards

James

Thepparit
Thailand

7 June, 2003

Hello Mark,

It is really a good web for DIY audio information. :)

Thepp

Maurice Oden
Australia

25 May, 2003

I am delighted to find a site that appears to know something about Rogers speakers.

As the company has been taken over I cannot find information about the Studio1 model that I have and I would like to attempt to modify the existing crossover to make the speaker bi-wired.Would you be kind enough to advise me where I could find this info?

I have looked at the circuit board,but without much electical knowledge and a circuit diagram,I have very little idea of how to proceed.I had thought of simply breaking the copper connections to the tweeter on the circuit board at the amp input and leading the tweeter connections out to 2 new terminals on the back of the cabinet.But which connections???? It is a puzzle!

Scott (SAWZALL)
Washington DC, USA

16 May, 2003

A rather sweet website... Will be quite interested if you take your preamp to the DIY market.

Francois
Venezuela

14 May, 2003

Andries
Holland

14 May, 2003

I realy like your way of building the amp, and think i'll give it a try. I have a question however, would it be possible to use the gainclone as a guitar amplifier, and what kind of a preamp do i have to use,to lift-up the input sensitivity to about 20mv. Do you have a sugestion, or more usefull, a schematic ?

You've build a real nice and simple to copy amp, and your website is really top of the tops ! ! !

Best regards,
Andries

ShOoPoO~
Canada

13 May, 2003

Matt Wenham - DoctorRad
UK

6 May, 2003

Hi Mark, Found your pages on a Gainclone search, some very nice stuff you have going on here.

I think you might find Ben Duncan's writings on preamp design a bit of a eye opener. Try contacting Audio Synthesis for reprints of his AMP-01, AMP-02, PAS-01, PAS-02 and CD Player mods from Hifi News. I only have AMP-01 these days unfortunately, but most of the groundwork on how op-amp circuits behave in the real world is covered in this text. Suffice to say, for DIY projects, it really is worth avoiding spoiling the boat for a ha'ppeth of tar and going for better op-amps than 5532s. But as you point out, they may well be 'good enough', and they're cheap to replace when things go wrong.

My current thoughts are leaning towards trying a Gainclone with a fully regulated supply. Naim have been doing it since the 70s, but thankfully, Moore's Law apparently applies to analogue chips as well as digital. You can now get stupidly cheap, stupidly good (value) chips to do pretty much anything. It's a New Golden Age, it really is.

Cheers,

Matt...

Darren Latto
Arizona USA

24 April, 2003

Stefano
Italy

20 April, 2003

John Alan Woods

17 April, 2003

Mike Palmer
Brisbane, Queensland, Australia

14 April, 2003

Now that my interest in something I contemplated years ago has been rekindled............... onward and upward !! I like your implementation, and it has given me a good head start as I journey toward creating my preamp......

Mike

Pete Ream
Notts UK

14 April, 2003

Colin Hepburn

10 April, 2003

Paul M Thomas
UK

6 April, 2003

Hello Mark!

This is a really good website!

Just like you I have an accumulation of Hi-Fi around the house and have always had this interest for as long as I can remember.

I have been a fan of the BBC sound for sometime so in my main system I have Spendor SP1/2 biamped with Audiolab 8000C ans 2 x 8000P. This sounds very natural and easy going. I found the internal wiring of the Spendors not that good so I replaced with new heavier wire soldered direct to the crossover and speaker unit tags.

Upstairs I have (courtesy e-bay) Quad 33/303/FM2 ans Tannoy Mercury M2.5 speakers. The 33 I cleaner up the switches and squeezed the internal multiconnectors closer together to remove an intermittent fault. Next 303 capacitors changed (courtesy Avondale). Finaly for FM2 (a valve/transistor hybrid)a full service from onething audio and a new modern decoder fitted. This set gives a fantastic clean sound punchs but easy to listen too. I also heard more detail on CDs through it. I am not sure now which sytem is best - which proves all Hi-Fi is a compromise. I am still a big fan of the old Quad designs even if there is evidence of cost cutting in the components - you have to respect an amplifier if it is still sounding good at 30 years old! My only other prized Hi-Fi item is a 1/2 track Revox G36 valve tape recorder (serviced a few years ago with only minor component upgrades) which provides fantastic recordings of live broadcasts.

Good listening

PAUL

PJ
Sweden...

29 March, 2003

John Bell
UK

18 March, 2003

Frank Mc Alinden
Aus...

4 March, 2003

Hi Mark,
          One of the guys on the UKHA Home automation list mentioned your site for some pic info so had to have a look...Just drooled looking at the workshop photos and although not an audio electronics type found the articles interesting...Looking forward to some more pic projects..
keep up the good work
Frank

John Morcom
Canterbury, UK

23 February, 2003

I liked your site very much.

I've also put together a PGA2310 based pre-amp (using 3 of these devices to give 5.1 surround controlled by PIC16F877 with optical encoder for volume and VFD display - a case of great minds think alike?) and have been very pleased with its sound quality.

James Curtis
New Zealand

22 February, 2003

Hi Mark,

great to finally find a site with excellent information on Rogers speakers. Very hard to find now in NZ.

I bought my pair of LS2a/2's 10 years ago and, with the exception of a pair of Proac Tablettes at 3 times the price, have heard nothing to match their unique, smooth sound.

I lost the manuals for them a while back now during a move so thanks for posting them, great to re-read and have on file. Love the site!

James.

Allan Kragelund
Denmark

17 February, 2003

Andrew Thompson
Cambridge, UK

5 February, 2003

Gary Morton
UK

13 January, 2003

Lee Edmunds
Walsall, UK

7 January, 2003

Mark,

What a site. I am in the early stages of converting my garage and I must say you have given me some food for thought. We're also partitioning down the middle with the warm part being a computer/play room for the kids (and me!)

Great work - keep it up

Lee Edmunds

Paul Williams
Portsmouth, UK

14 December, 2002

Thanks Mark, really good stuff, good content and style! I had been a Z80 fiend in the early days until the Mrs made me put away the 'bits of wire'. My son now has a GCSE project with PICs ('F627 flavour) and I am trying to catch up, but I recognise the principles are the same for all PICs. I also find http://www.piclist.com/techref/microchip/intro/pic.htm is useful.

Keep up the DIY, but don't forget some ventilation with the insulation etc. Professionlly I too often come across 'damp' when in fact it is condensation either on the surface or as interstitial condensation - so try to use a vapour barrier to keep it dry but let it breathe. Oops sorry, I'm lecturing... Bye.

Leo Lau
Hong Kong

28 November, 2002

John Daniel
Bedfordshire, UK

27 November, 2002

Bami
The Netherlands

25 November, 2002

Brian Phillips
Iver Bucks, UK

25 November, 2002

A great site, Mark. How do you find the time to maintain it?

We have a lot in common - BBC, IPK cases, RC volume controls, pcbs that are a work of art...

Keep up the good work, and thanks for the tip on the new displays.

Jeff Chen
Taiwan

19 November, 2002

Bill Annau
Edinburgh Scotland

15 November, 2002

Hi. Love your site. I am likewise a lover of Rogers loudspeakers; I have LS7s, Studio 1s and until recently, LS5/8s (ex BBC Edinburgh) My first Rogers were LS6s, but I found I needed more bottom end, hence, the LS7s. Unfortunately, my Studio 1s were damaged when my Cyrus II amp blow it's o/p. However, I have replaced the damaged LF unit, but noticed that some of the capacitors on the crosover were a bit discoloured. Do you have any info on the components used in this xover? I would like to replace the offending components but cant identify their values because of the discolouration. Hope you can help.

Regards.
Bill Annau

Koi Lee Loh
Singapore

15 November, 2002

I own a MF A1 and the input selector is faulty as I do not hear definite clicks. Just a smooth turn to select one input from another. Just checking to see if you have a solution.

Koi

Arnold Lieberman
Essex, UK

14 November, 2002

Laurie K.L.Chan
Hong Kong

14 November, 2002

Dear Mark,

It is a pleasure to visit your site. Great work. I am experienced in analogue but not digital (I belong to the older generation). I don't quite understand the digital volume control with the BB chips.

I wish to implement such control into my IC preamp project that uses the current feedback chips in parellel config which already designed. I am wondering if you could help me with straight forward circuit diagram with BB volumn control with remote function and FL diaplay ?
Best regards
Laurie

Richard Savary
Quebec City, Canada

12 November, 2002

Simply astonishing.....

How did you get all this information ???

I've search for a long time information regarding the A1. Seems my "quest" has finally come to an end !!

On top of that, you had the presence of mind to ad on your web page a "bookmark" shortcut. An additionnal bookmark with my existing 200 audio links....

quan vu
USA

10 November, 2002

Tony
Essex

4 November, 2002

Roberto
ITALY, Rimini town

30 October, 2002

BEST SITE!!!!
VERY GREAT WORKS !!!

:-))))

COOL

Claus H
Denmark

29 October, 2002

David John
Malaysia

20 October, 2002

prugnieres philippe
France

24 September, 2002

William Cameron
Dunstable, Beds., UK

7 September, 2002

Chris Found
UK

27 August, 2002

tony
australia

14 August, 2002

ron mackay
uk, scotland!

31 July, 2002

Richard Thompson
UK

27 July, 2002

Great web site !!!

All the info on Rogers LS 5/8s remind me of my time in BBC BH London 84-88.

Well done on an excelent site.

Cheers Richard Thompson.

David Lugosi
EU, Hungary

19 July, 2002